On this day in 2017, the world's most trusted and secure bitcoin hardware wallet, the
Coldcard, was first announced by Coinkite. Built from the ground up as a Bitcoin-only signing device, Coldcard introduced an air-gapped, open-source architecture with a secure element, PSBT support, and no USB data connection required. Its paranoid security model -- including brick-me PINs, duress wallets, and fully verifiable firmware -- set a new standard for hardware wallet design and inspired an entire generation of signing devices.
Disclosure: Coinkite Inc. is the maker of this product and the publisher of this site.